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/* _wordcopy_fwd_aligned -- Copy block beginning at SRCP to
block beginning at DSTP with LEN `op_t' words (not LEN bytes!).
Both SRCP and DSTP should be aligned for memory operations on `op_t's. */
static void _wordcopy_fwd_aligned (long int dstp, long int srcp, size_t len)
{
op_t a0, a1;
switch (len % 8)
{
case 2:
a0 = ((op_t *) srcp)[0];
srcp -= 6 * OPSIZ;
dstp -= 7 * OPSIZ;
len += 6;
goto do1;
case 3:
a1 = ((op_t *) srcp)[0];
srcp -= 5 * OPSIZ;
dstp -= 6 * OPSIZ;
len += 5;
goto do2;
case 4:
a0 = ((op_t *) srcp)[0];
srcp -= 4 * OPSIZ;
dstp -= 5 * OPSIZ;
len += 4;
goto do3;
case 5:
a1 = ((op_t *) srcp)[0];
srcp -= 3 * OPSIZ;
dstp -= 4 * OPSIZ;
len += 3;
goto do4;
case 6:
a0 = ((op_t *) srcp)[0];
srcp -= 2 * OPSIZ;
dstp -= 3 * OPSIZ;
len += 2;
goto do5;
case 7:
a1 = ((op_t *) srcp)[0];
srcp -= 1 * OPSIZ;
dstp -= 2 * OPSIZ;
len += 1;
goto do6;
case 0:
if (OP_T_THRES <= 3 * OPSIZ && len == 0)
return;
a0 = ((op_t *) srcp)[0];
srcp -= 0 * OPSIZ;
dstp -= 1 * OPSIZ;
goto do7;
case 1:
a1 = ((op_t *) srcp)[0];
srcp -=-1 * OPSIZ;
dstp -= 0 * OPSIZ;
len -= 1;
if (OP_T_THRES <= 3 * OPSIZ && len == 0)
goto do0;
goto do8; /* No-op. */
}
do
{
do8:
a0 = ((op_t *) srcp)[0];
((op_t *) dstp)[0] = a1;
do7:
a1 = ((op_t *) srcp)[1];
((op_t *) dstp)[1] = a0;
do6:
a0 = ((op_t *) srcp)[2];
((op_t *) dstp)[2] = a1;
do5:
a1 = ((op_t *) srcp)[3];
((op_t *) dstp)[3] = a0;
do4:
a0 = ((op_t *) srcp)[4];
((op_t *) dstp)[4] = a1;
do3:
a1 = ((op_t *) srcp)[5];
((op_t *) dstp)[5] = a0;
do2:
a0 = ((op_t *) srcp)[6];
((op_t *) dstp)[6] = a1;
do1:
a1 = ((op_t *) srcp)[7];
((op_t *) dstp)[7] = a0;
srcp += 8 * OPSIZ;
dstp += 8 * OPSIZ;
len -= 8;
}
while (len != 0);
/* This is the right position for do0. Please don't move
it into the loop. */
do0:
((op_t *) dstp)[0] = a1;
}
/* _wordcopy_fwd_dest_aligned -- Copy block beginning at SRCP to
block beginning at DSTP with LEN `op_t' words (not LEN bytes!).
DSTP should be aligned for memory operations on `op_t's, but SRCP must
*not* be aligned. */
static void _wordcopy_fwd_dest_aligned (long int dstp, long int srcp, size_t len)
{
op_t a0, a1, a2, a3;
int sh_1, sh_2;
/* Calculate how to shift a word read at the memory operation
aligned srcp to make it aligned for copy. */
sh_1 = 8 * (srcp % OPSIZ);
sh_2 = 8 * OPSIZ - sh_1;
/* Make SRCP aligned by rounding it down to the beginning of the `op_t'
it points in the middle of. */
srcp &= -OPSIZ;
switch (len % 4)
{
case 2:
a1 = ((op_t *) srcp)[0];
a2 = ((op_t *) srcp)[1];
srcp -= 1 * OPSIZ;
dstp -= 3 * OPSIZ;
len += 2;
goto do1;
case 3:
a0 = ((op_t *) srcp)[0];
a1 = ((op_t *) srcp)[1];
srcp -= 0 * OPSIZ;
dstp -= 2 * OPSIZ;
len += 1;
goto do2;
case 0:
if (OP_T_THRES <= 3 * OPSIZ && len == 0)
return;
a3 = ((op_t *) srcp)[0];
a0 = ((op_t *) srcp)[1];
srcp -=-1 * OPSIZ;
dstp -= 1 * OPSIZ;
len += 0;
goto do3;
case 1:
a2 = ((op_t *) srcp)[0];
a3 = ((op_t *) srcp)[1];
srcp -=-2 * OPSIZ;
dstp -= 0 * OPSIZ;
len -= 1;
if (OP_T_THRES <= 3 * OPSIZ && len == 0)
goto do0;
goto do4; /* No-op. */
}
do
{
do4:
a0 = ((op_t *) srcp)[0];
((op_t *) dstp)[0] = MERGE (a2, sh_1, a3, sh_2);
do3:
a1 = ((op_t *) srcp)[1];
((op_t *) dstp)[1] = MERGE (a3, sh_1, a0, sh_2);
do2:
a2 = ((op_t *) srcp)[2];
((op_t *) dstp)[2] = MERGE (a0, sh_1, a1, sh_2);
do1:
a3 = ((op_t *) srcp)[3];
((op_t *) dstp)[3] = MERGE (a1, sh_1, a2, sh_2);
srcp += 4 * OPSIZ;
dstp += 4 * OPSIZ;
len -= 4;
}
while (len != 0);
/* This is the right position for do0. Please don't move
it into the loop. */
do0:
((op_t *) dstp)[0] = MERGE (a2, sh_1, a3, sh_2);
}
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